Home / 28,719.20-43,078.76-8,999.28

Finding the Fourth Proportional to 28,719.20, 43,078.76 and 8,999.28

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Solution

The fourth proportional to 28,719.20, 43,078.76 and 8,999.28 is: 13,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.20 : 43,078.76 = 8,999.28 : x
  2. Step 2: Convert to fraction form
    28,719.20/43,078.76 = 8,999.28/x
  3. Step 3: Cross multiply
    28,719.20x = 43,078.76 × 8,999.28
  4. Step 4: Simplify right side
    28,719.20x = 387,677,823.29
  5. Step 5: Solve for x
    x = 387,677,823.29/28,719.20
  6. Step 6: Final answer
    x = 13,498.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.